Before you install Floating Sticky Cart for WooCommerce, make sure you've already installed and activated the WooCommerce plugin for WordPress.
After purchase, download the .zip file of the plugin from your WooCommerce account and save it on your computer.
To install the plugin, go to Dashboard and find the Plugins section from the left menu and choose Add New.
Afterward, click the Upload Plugin button.
Upload the plugin file and click Install Now.
The plugin settings will appear in the WooCommerce section: